The half-assed design of the webpage indicates that Apple is probably not paying attention to it at all. So what's the purpose of this site exactly?
Edit: oh wow, downvoted for stating objective facts that take seconds to verify.
Inventing new words for concepts properly described by old words is what's annoying, and it's really imprecise when people outside the specialized field start to have different opinions about what the neologisms mean than the people inside the field who actually use them.
That's besides the inherit prejudice in the choice of the word "viral".
Ah I see, you're just trolling.
"viral" is perfectly precise. One of properties of copyleft licences is that they are viral (and need to be by design).
If being viral is a good or a bad thing, is another discussion.
This page dates back to the early 2000s, when Apple was a relatively small company after years of decline, and OS X was gaining popularity among UNIX users. They hired some people from the FreeBSD project (most notably Jordan Hubbard, one of the founders of FreeBSD). This was also the time that everyone and their dog was going open source (a trend started by Netscape).
The industry's open sourcing spree, their traction in the UNIX community, and the fact that they were importing a lot of new BSD code, probably moved them to make non-Aqua/Cocoa source open source.
Suddenly removing source code now would probably be a small PR disaster. So, they basically let stuff rot: some new stuff is missing and they are slow in posting new code drops.
For instance the Apple build of gcc is still needed to build some OSS projects, and they are probably found only at this site.